Can this faith be extended from the micro to the macro level of analysis? We tend to think not. As we move into the rarefied macro zone, we shift from biology to psychology to sociology and must replace any faith we may have in biological processes with a faith in cultural processes. We can, however, keep the faith. Capitalism, it is claimed, is partly based on an extension of the biological metaphor. Darwin's survival of the fittest principle was applied to the marketplace by the advocates of social Darwinism. However, more careful consideration suggests that this was more rationalization than rationale. It is more likely that our survival depended on co-operation rather than competition. It was the fact that we could work together in groups which enabled us to catch the faster animals and kill the stronger ones, and thus crowned this slow puny creature as King of the Jungle. Our genes may, indeed, have been fighting among themselves, as argued by the sociobiologists, but we were working together.